Question

Tyloses

• A. Are ballon-like swelling of xylem parenchyma cells in the lumen of vessels
• B. Are found in heartwood
• C. Make heartwood functional
• D. Both (A) and (B)

Answer 1

The correct option is A Are ballon-like swelling of xylem parenchyma cells in the lumen of vessels

Tyloses are outgrowths on parenchyma cells of xylem vessels of secondary heartwood. When the plant is stressed by drought or infection, tyloses will fall from the sides of the cells and "dam" up the vascular tissue to prevent further damage to the plant.

So the correct option is 'Are ballon-like swelling of xylem parenchyma cells in the lumen of vessels'.